For those who are keeping their wallet on a diet, KeyRingThing offers a simple and useful service: putting all those barcode-based loyalty cards you carry onto a single, six-in-one card for your wallet. It's a fine idea, and one that has existed before, in DIY form and as a similar web-based service. But why not go all the way, and save all your cards as bits instead of atoms, on your phone? Take a closeup phonecam photo of each card and save them in a dedicated album - and chances are, the barcode scanner will be able to read them right off the phone's screen![via Lifehacker]